Texas Interstate Map

Explore the Texas map showing interstate highways, Texas has the most extensive interstate highway system in the U.S., covering over 3,200 miles. Major interstates like I-10, I-35, and I-45 connect key cities such as Houston, Dallas, and San Antonio, facilitating commerce and travel. I-10, the longest interstate in Texas, spans 879 miles from El Paso to the Louisiana border. Texas' interstate highways play a crucial role in supporting the state's economy, contributing to the movement of goods and people across the region. Despite its size, traffic congestion remains a challenge in urban areas.

About Texas Interstate Map

Explore the map of Texas showing interstate highways with international boundary, state boundary, state capital and major cities.

Texas Interstate Highways

The Texas interstate highway system is the largest in the United States, with over 3,200 miles of interconnected roads that serve as vital arteries for commerce, travel, and daily transportation. Established as part of the Federal-Aid Highway Act of 1956, Texas' interstate network connects major cities, rural areas, and borders, playing a crucial role in both regional and national transportation. The state’s size and its strategic location as a gateway to Mexico make its highways essential for trade, particularly through the North American Free Trade Agreement (NAFTA) corridors.

Key Interstate Highways in Texas

Interstate 10 (I-10)

I-10 is the longest interstate highway in Texas, stretching approximately 879 miles from the Texas-New Mexico border near El Paso to the Louisiana state line. It crosses major Texas cities such as San Antonio, Houston, and Beaumont. I-10 is a critical east-west route, connecting the southern United States and providing a vital link for freight transport between the Gulf Coast and the West Coast.

Interstate 35 (I-35)

I-35 is one of the most important north-south interstates in Texas, running 503 miles from Laredo on the U.S.-Mexico border through San Antonio, Austin, and Dallas/Fort Worth, before continuing into Oklahoma. It is a key NAFTA corridor, facilitating cross-border trade and contributing significantly to the state's economy. I-35 also handles heavy passenger and commercial traffic, leading to congestion, particularly in the Austin and Dallas areas.

Interstate 45 (I-45)

I-45, at 285 miles long, runs entirely within Texas, connecting the cities of Dallas and Houston. This interstate is vital for intrastate travel and trade between two of Texas' largest metropolitan areas. I-45 is also a primary evacuation route for Houston residents during hurricane season, making it a critical part of the state’s emergency response infrastructure.

Interstate 20 (I-20)

Spanning 636 miles, I-20 runs from the west near Kent, Texas, through Midland, Abilene, and Fort Worth, before exiting the state into Louisiana. I-20 serves as a major east-west corridor, providing an alternative route to I-10 for commercial and personal traffic. It supports significant freight movement, especially for goods related to the oil and gas industries prevalent in West Texas.

Interstate 30 (I-30)

I-30 stretches 223 miles from Fort Worth through Dallas and exits the state toward Little Rock, Arkansas. This relatively short interstate is nonetheless a vital route for daily commuters and freight traffic moving east from the Dallas-Fort Worth metroplex.

Interstate 69 (I-69)

I-69 is a developing interstate highway aimed at creating a direct route from the U.S.-Mexico border in Texas to Canada. Currently, sections of I-69 exist primarily in southern Texas near cities like Corpus Christi and McAllen. Once complete, I-69 will be a key corridor for international trade, facilitating the movement of goods between Mexico and the northern U.S. and Canada.

Economic Impact and Role in Trade

The Texas interstate highways are essential for the state’s economy, serving both as critical trade corridors and as infrastructure for millions of residents. Texas is a leader in cross-border trade with Mexico, and much of that trade depends on highways like I-35 and I-69. In 2022, Texas handled approximately $451.7 billion in goods exchanged with Mexico, making these highways indispensable for freight logistics and distribution.

In addition to trade with Mexico, Texas highways also serve the state’s booming energy industry. Interstate routes like I-20 and I-10 are heavily used for transporting oil, gas, and related products from West Texas, one of the most productive oil regions in the country.

Traffic and Congestion

Texas’ rapidly growing population, which reached over 29 million in 2020, has placed increased pressure on the interstate system. I-35 in particular is notorious for its traffic congestion, especially in urban areas like Austin and Dallas. According to the Texas A&M Transportation Institute, the Texas Triangle region (connecting Dallas-Fort Worth, Houston, and San Antonio) experiences some of the heaviest congestion in the country, with hours of delays costing billions of dollars in lost productivity annually.

In response, the Texas Department of Transportation (TxDOT) has invested heavily in expanding and upgrading its interstate highways. Projects such as the I-35 Expansion Project, the Grand Parkway (TX-99) around Houston, and the development of I-69 are part of long-term strategies to reduce congestion and improve safety.

Safety and Maintenance

Maintaining the vast Texas interstate system is a continuous challenge. TxDOT allocates significant resources to pavement repair, bridge maintenance, and safety enhancements. In 2020 alone, the state invested more than $10 billion in highway improvements. Safety is also a major concern, particularly in rural areas where long distances between cities can lead to higher speeds and greater accident risks. To address this, TxDOT has implemented programs aimed at reducing accidents through better signage, roadway designs, and public awareness campaigns.

Future Developments

Texas’ highway network is expected to undergo significant changes over the next decade, driven by population growth, technological advancements, and climate considerations. TxDOT is actively exploring ways to incorporate intelligent transportation systems (ITS) that use technology to monitor traffic conditions, provide real-time updates, and enhance the efficiency of the highway system. Additionally, there are plans to introduce autonomous vehicle infrastructure in major urban areas, which could further alleviate congestion and improve road safety.

Environmental sustainability is another area of focus for future highway projects. As Texas seeks to reduce its carbon footprint, future developments may include electric vehicle (EV) charging stations along interstate corridors and the introduction of smart road designs that integrate renewable energy sources.

Primary Interstate Highways

S.N.	Number	Formed	Length in mi	Length in km	Northern or eastern terminus	Southern or Western Rerminus	Current / Removed
1	I-2	2013	46.8	75.3	I-69E/US 77/US 83 in Harlingen	US 83/Bus. US 83 in Peñitas	current
2	I-10	1959	877.455	1,412.13	I-10/US 90 at Louisiana state line in Orange	I-10/US 85/US 180 at New Mexico state line in Anthony	current
3	I-14	2017	25.9	41.68	I-35/US 190 near Belton	US 190/SH 9 in Copperas Cove	current
4	I-20	1959	634.723	1,021.49	I-20 at Louisiana state line east of Waskom	I-10 between Kent and Toyah	current
5	I-27	1968	124.182	199.852	I‑40/US 60/US 87/US 287 in Amarillo	US 87/Loop 289 in Lubbock	current
6	I-30	1959	223.404	359.534	I-30/US 59/US 71 at Arkansas state line in Texarkana	I-20 in Fort Worth	current
7	I-35	1959	407.195	655.317	I-35/US 77 at Oklahoma state line north of Gainesville (Northern section)I-35E & I-35W in Hillsboro (Southern section)	I-35E & I-35W in Denton (Northern section)Fed. 85 at Juárez-Lincoln International Bridge in Laredo (Southern section)	current
8	I-35E	1959	96.657	155.554	I-35 & I-35W in Denton	I-35 & I-35W in Hillsboro	current
9	I-35W	1959	85.283	137.25	I-35 & I-35E in Denton	I-35 & I-35E in Hillsboro	current
10	I-37	1959	142.787	229.793	I-35/US 281 in San Antonio	US 181/SH 35 in Corpus Christi	current
11	I-40	1959	177.139	285.078	I-40 at Oklahoma state line east of Shamrock	I-40 at New Mexico state line in Glenrio	current
12	I-44	1982	15.398	24.781	I-44/US 277/US 281 at Oklahoma state line north of Burkburnett	US 277/US 281/US 287 in Wichita Falls	current
13	I-45	1959	284.913	458.523	I-30, I-345, US 67 in Dallas	SH 87 in Galveston	current
14	I-49	proposed	-	-	I-49 at Arkansas state line north of Texarkana	I-49/US 59/US 71 at Arkansas state line north of Texarkana	-
15	I-69	2011	74.9	120.5	US 59 near Cleveland	US 59/Spur 529 in Rosenberg	current
16	I-69C	2013	18	29	US 281/FM 490 in Edinburg	I-2/US 83/US 281 in Pharr	current
17	I-69E	2013	61.1	98.3	US 77 north of RaymondvilleI-37/US 77 in Corpus Christi	Fed. 101/Fed. 180 at Veterans International Bridge in BrownsvilleUS 77/FM 2826 in La Paloma-Lost Creek	current
18	I-69W	2014	1.4	2.3	I-35/US 59/US 83/Loop 20 in Laredo	Fed. 85D at World Trade International Bridge in Laredo	current

Auxiliary Interstate Highways

S.N.	Number	Formed	Length in mi	Length in km	Northern or eastern terminus	Southern or western terminus	Removed
1	I-110	1967	0.891	1.434	I-10/US 54/US 180 in El Paso	Fed. 45 at Bridge of the Americas in El Paso	current
2	I-169	2,015	1.5	2.4	I-69E/US 77/US 83 in Olmito	Port of Brownsville	current
3	I-345	1,964	1.4	2.253	US 75/Spur 366 in Dallas	I-30/I-45/US 67 in Dallas	current
4	I-369	2,013	3.5	5.6	I-30/US 59 in Texarkana	US 59/SH 93/Loop 151 in Texarkana	current
5	I-410	1,959	49.488	79.643	Beltway around San Antonio	Beltway around San Antonio	current
6	I-610	1,959	37.972	61.11	Beltway around Houston	Beltway around Houston	current
7	I-635	1,959	36.999	59.544	SH 121 in Grapevine	I-20 in Balch Springs	current
8	I-820	1,959	35.173	56.605	I-20/US 287 in Fort Worth	I-20 in Fort Worth	current

Business Interstate Highways

S.N.	Number	Formed	Length in mi	Length in km	Northern or Eastern Terminus	Southern or Western Terminus	Removed
1	I-10 BL	1990	2.747	4.421	I-10 in Sierra Blanca	I-10 in Sierra Blanca	current
2	I-10 BL	1990	2.881	4.637	I-10 in Van Horn	I-10 in Van Horn	current
3	I-10 BL	1991	2.000	3.219	I-10/SH 17 east of Balmorhea	I-10/FM 2903 north of Balmorhea	current
4	I-10 BL	1991	1.398	2.250	I-10/US 67/US 385 in Fort Stockton	I-10/US 67 in Fort Stockton	current
5	I-20 BL	1991	14.042	22.598	I-20 east of Barstow	I-20 west of Pecos	current
6	I-20 BL	1991	8.223	13.234	I-20 in Monahans	I-20 west of Monahans	current
7	I-20 BL	1991	31.761	51.114	I-20 east of Midland	I-20 in West Odessa	current
8	I-20 BL	1995	4.687	7.543	I-20 east of Stanton	I-20 west of Stanton	current
9	I-20 BL	1990	5.609	9.027	I-20 in Big Spring	I-20 west of Big Spring	current
10	I-20 BL	1990	1.069	1.720	I-20 in Westbrook	I-20/FM 670 west of Westbrook	current
11	I-20 BL	1990	5.926	9.537	I-20 east of Colorado City	I-20 west of Colorado City	current
12	I-20 BL	1990	1.633	2.628	I-20 in Loraine	I-20 west of Loraine	current
13	I-20 BS	1990	1.644	2.646	Bus. US 84/FM 608 in Roscoe	I-20 west of Roscoe	current
14	I-20 BL	1990	6.448	10.377	I-20/US 84/SH 70 in Sweetwater	I-20/US 84 west of Sweetwater	current
15	I-20 BL	1990	2.076	3.341	I-20/US 84 east of Trent	I-20/US 84 west of Trent	current
16	I-20 BL	1990	2.786	4.484	I-20/US 84/FM 1235 east of Merkel	I-20/US 84 west of Merkel	current
17	I-20 BL	1990	1.661	2.673	I-20/US 84 in Tye	I-20/US 84 in Tye	current
18	I-20 BL	1990	8.466	13.625	I-20 in Abilene	I-20/US 84 in Tye	current
19	I-20 BL	1990	2.826	4.548	I-20 east of Baird	I-20/FM 2047 west of Baird	current
20	I-27 BL	2002	1.168	1.880	I-27/US 87 in Hale Center	I-27/US 87 in Hale Center	current
21	I-27 BL	1990	9.282	14.938	I-27/US 87 in Plainview	I-27/US 87 south of Plainview	current
22	I-35 BL	1991	3.400	5.472	I-35/US 83 in Laredo	Fed. 85 at Gateway to the Americas International Bridge in Laredo	current
23	I-35 BL	1990	1.222	1.967	I-35/SH 44 north of Encinal	I-35 south of Encinal	current
24	I-35 BL	1991	2.872	4.622	I-35 in Cotulla	I-35 south of Cotulla	current
25	I-35 BL	1991	4.147	6.674	I-35 north of Dilley	I-35 south of Dilley	current
26	I-35 BL	1991	5.449	8.769	I-35 north of Pearsall	I-35/FM 1581 in Pearsall	current
27	I-35 BL	1991	4.488	7.223	I-35 in New Braunfels	I-35 in New Braunfels	current
28	I-35 BL	1990	1.461	2.351	I-35 in Kyle	I-35 in Kyle	current
29	I-35 BL	1990	3.648	5.871	I-35/FM 3406 in Round Rock	I-35 in Round Rock	2013
30	I-35 BL	1990	5.100	8.200	I-35 in Georgetown	I-35 in Georgetown	2006
31	I-35 BL	1990	2.288	3.682	I-35W in Alvarado	I-35W in Alvarado	current
32	I-35 BL	1991	1.883	3.030	I-35 in Sanger	I-35 in Sanger	current
33	I-40 BL	1990	0.779	1.254	I-40 east of Glenrio	Historic US 66 at New Mexico state line in Glenrio	current
34	I-40 BL	1990	2.369	3.813	I-40 east of Adrian	I-40 west of Adrian	current
35	I-40 BL	1990	3.395	5.464	I-40 east of Vega	I-40 west of Vega	current
36	I-40 BL	1990	14.125	22.732	I-40 east of Amarillo	I-40 west of Amarillo	current
37	I-40 BL	1990	3.533	5.686	I-40 east of Groom	I-40 west of Groom	current
38	I-40 BL	1990	3.796	6.109	I-40 east of McLean	I-40 west of McLean	current
39	I-40 BL	1993	2.770	4.458	I-40 east of Shamrock	I-40 west of Shamrock	current
40	I-45 BL	1990	6.367	10.247	I-45/US 287 north of Corsicana	I-45 in Corsicana	current
41	I-45 BL	1990	4.512	7.261	I-45 in Ennis	I-45 in Ennis	current
42	I-45 BL	1990	2.330	3.750	I-45 north of Palmer	I-45 in Palmer	current
43	I-45 BL	1990	3.367	5.419	I-45 north of Ferris	I-45 south of Ferris	current